Lathe.



nu. 673,709.I A. .Patented may 7, |9ol.

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LATHE.

(Application. lsd Aug. 10, 1900.) (No Indel.) 3 Shoehwsheet l.

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Nn. 673,709. y n Patented may 7', lsml` F. s. nuucAN.

LATHE. (Application filed Aug; 10, 1900.)

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no. 673,709. Y f Patented may 7, |901.

` Ff B. DUNCAN. f y

. LATHE.

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A'UNiTED' STATES ATENT (duinen.l

FREDERICK B. DUNCAN, OF MADSONLWISCONSIN, ASSIGNOR TO THE NORTH- l ERN ELECTRICAL MANUFACTURING COMPANY, OF SAME PLACE.v

LATHE.

SPECIFICATION forming part of Letters Patent No. 673,709, dated May 7, 1901. Application iled August l0, 1900. Serial No. 26.452. No model.) 4

a subject of the Queen of Great Britain, re-` siding at Madison, in the county of Dane and .s s, Fig. i.

vState of Wisconsin, have invented a certain new and useful Improvementi'n Lathes, of which the following is a specification.

electric motor.

My invention is illustrated in the accompanying drawings, wherein- A Figure-l is a side elevation of adevi'ce embodying my invention. Fig..2 is a plan view with parts omitted. Fig. 3 is a section on line Fig. 4 is a diagrammatic view showing the electrical connections with the controller.

Like letters'refer to like parts throughout.

the several figures.

My invention may be applied to lathes oi As shown in Fig. 1, I provide two supports A A, which are carried in any various kinds.

convenient manner by the lathe-bed, the supports being located on each side of the lathespindle B. An electric motor C of 4any desiredr construction is mounted upon the supports A and is located above the spindle B, as shown. I prefer to form the supports A by forming projecting parts on the head-stock D of the lathe, one on each side of the spindle. The motor is then rigidly fastened to these projecting parts, so as to be above the lathe-spindle. This construction has many advantages It permits the use of any design of motor. It permits the motor to ybe easily and quickly installed and easily and quickly removed if it becomes necessary to repair either the motor or the other mechanism.` It very materially strengthens the head-stock, so as to stiften it and make it more rigid than is the.

' ed with the gear B.

- mechanism of any desired construction is providedY for connecting either of the gearsv B and B2 with the spindle. I have shown in Fig. l a simple construction for this purpose. In this construction a sleeve B3 is mounted upon the lathe-spindle,` so as to rotate therewith, but is adapted to be reciprocated. This My invention relates to improvements inl lathes, and has for its object to provide a newy and improved lathe directly connected to auv sleeve isprovided with the clutch members B4 and B5, which are adapted to alternately en- 6o gage the gears B and B2 or some part associated therewith, so as to connect them with the lathe -spindle As herein shown, the

Y clutch member B5 makes direct frictional contact with the gear B2 at one end, and Bl with 65 the clutch member BVS-at the other end, said clutch member B6' being operatively connect- This connection may be made in any desiredy manner. As herein shown, the gear B is provided with'a hub or 70 sleeve to which the part B6 is keyed or otherwise attached. A clutch-lever B7 is connected with the sleeve B3, so as to move it. lt will thus be seen rthat a movement of the sleeve in one direction connects the motor to the spindle through the pinion C', and a movement of the sleeve in the other direction connects the motor to the spindle through the pinion C2; These pinions and gears are arranged so as to produce two different speeds 8o of rotation of the spindle. The lathe is provided with the ordinary back gear E,as shown,

so that a further variation in the speed may be obtained. Y

The motor is provided with a controller,by means of which it may be run at various speeds, and hence it will be seen that a great variation in speed control is obtained. This controller may be of any desired construction and is preferably arranged so that there is a 9o controllable resistance in circuit with the eld and with the armature. I have shown this controller diagrammatically in Fig. 4. This controlling device is provided with a controlling-arm F, which is moved along suitable contacts to vary the resistance F in the armature and the resistance Fz'in circuit with the field-coils. The controlling-arm is held in position by the holding-.piece F3, controlled by the magnet F4. By means of this conroo troller the speed of the motor itselt can be varied through a great range, and hence it Y willlbe seen `that whenV used i-n connection 'l vgear--a great range of speed control is o'b-f' tained. This range of speed control is of the v greatest importance in Athe operation -fof the i' lathe. Y f

. IKS

self to the vconstruction shown.

as follows: When the motor is in position on' l nection with the three variations in speed pro- Vthemotor may be stopped by the operator.,y

pens that the operator getsthetool of the y leavingthe carriage u pon which the tool is mounted. Thisresult isobtained infmy con`` ,struction by ,means of thepush-buttonfG.

.Yenient position, and as hereinshown is `placed on the carriage G.- .The ,push-button.'

. 20` p y y'so that when operated said magnet will be; short-circuited; 1n this event t'hefholding-i` piece is released and-- the controlling-arm is automatically moved'` by a spring'orother re- .25

` .themoton .struction embodying vmy invention; butjit isi v'omitted and others. used withrparts'not'vherein .B'z or by the backA gear 'E when the leverBT4 with the other two speed-controlling devices-lr namely, the clutch mechanism and the back Some suitable means-is provided wherebyy without moving from his'work. It often haplathe caught or has some other mishap which necessitates his stopping the VIla-the without:VL

ThisL push-button may beilocated in 'any con-qi is connected in c'ircu'itwithv the magnetTF4,1

tracting device commonly employed fin such constructions tobreak thecircuit through il have described indetail a particular conof course evident that thev parts may be greatly varied' in form, construction, and arrangement and that some of .the parts -may .begi

shown without departing from the spirit lof myinvent'ion. TI .therefore do not l'imit'my-` The use and voperation of my invention are the supportsAandfis rigidly connected'there-v to, it is ready to bey set in operation. Thev motor is then connected `in circuitby means of the controller and is operatively Vconnectedy with thelathe-spindle'byfmoving the lever:

'is in an ott position. If thelever'ismoved in one direction, one ,speed Vis obtained, and if moved ina different direction a di Eerent speed is obtained. A third speed vis obtained 'by means of the lhack gear. A series of variations in speed is obtained by means of the controller, and this variation may be used in conducedby the clutch mechanism and the 'backv gear. It will therefore'jbe seen that a great range of speed control is obtained. It will further be seen that this construction elimi-` nates all the disadvantages of a counter-shaft, belts, and the like and permits the location of the'lathe'in'the most favorable light and also vplacesthe lathe under the perfect control of the Operator. This construction also .produces great rigidity in the head-stock andk spindle and permits any standard motor to .be used. If the tool of the lathe gets caught or anything else happens which necessitates stopping the llathe quickly, the operator can vinstantly stop the lathe by pressing the but- 1 `rtion is obtained.

gallel to .said sp "therewith 'l '2. Ala'the, comprising a spindle, a head- -ton G. It will -f'urther'befnoted'that this construction does not require any change in the lathe-bed, nor does it enlarge the lathe laterally, so that greater space is required. It will further be noted that by this means a symmetrical, efcientand'desirable construc- I have lshown the-project ing parts on the head-stock as projecting upwardly, and I prefer this position;v but itis ofcourse evident that they mightproject in the reverse direction, if desired.

I claim- Y v 1. YAself-containedI-lathe,lcomprisingahorizontal spindle, two supports, one located onl each side of said spindle, a direct-connected electric motor aboveathe spindle and removably mounted upon said-Lsupports,the varmarture-shaftof said motor substantially'parstock therefor, A'two lprojecting Vparts on said head-stock, one on each side of ysaid spindle, a motor carried or supported "by said `proindle y and directly connected j "ectin arts-andhavinv anarmaturee-sha'ft J .s P s substantially lparallel 'to Asaid spindle, said motor spanning' the space between said ltwo ,Y

projecting parts, so .astoloe 'in "the-'vertical plane through said spindle, *the armature.- shaft of `the ,motor directly connected -with said spindle. l

3. Alathe, comprising a spindle, hea/dfA stock therefor, a direct connected :electric motor mounted upon sa'idhead-stock, a controller for said motor, and means independent of and vseparate-from said controllerfor stop'v ping the motor, substantiallyas described..

4. A vrlathe, .comprising a spindle, 'twozsuploof` y,los

ports, one on each side'of 'said spindle, la'nrioa ter ,above the spindle and'vmoun-ted yupon said supports, said motor operatively connected with the spindle', a sleeve connected `vwith/the spindle -so as to rotate therewith, butfree'to IIO move ytherea'long,an`d,provided at each end with a clutch -membentwo opposed clutch j y l members, one at eachen'd of said sleeve,said members connected respectively rwith =suit able gears, and means ffor`connectipg-said gears to the shaftofthe motor.r

5. Alathe, comprising a spindle, a head- .I stocktherefor, two projectingjpartsintegral with said head-stock, one on each side of said spindle, a motor above the spindle and removably connected with saidprojecting parts,

'the shaft of said motor adapted tobe operativelyconnected withgthe spindle at two dierent points, and a clutch mecha-nism'he- 'tween said projecting parts of thefhead-stock adapted to control lthese two connections.,V

6. Alathe, comprising a spindle, two'supports, one on each-side o'fsaid spindle, va n10- tor above the spindle and mounted upon said supports, a motor-shaft having two ,pinions,

one on eachvside of the motor, said .pinions being connected to independent rotatable :parts mounted on said spindle, and means for 4alternately connecting said rotatable Yparts Withthe spindle, y from either end of the motor-shaft. Y

7. A lathe, comprising a spindle, a motor vabove the spindle and mounted in proximity to said spindle, a motor-shaft having two pinions, one on each side of the motor, said pinions being connected to independent rotatable parts mounted on said spindle, means for alternately connecting said rotatable parts with the spindle, so that it may be driven from either end of the motor-shaft and at so that it may be driven l variable speeds, a back gear adapted to be connected with the spindle, so as to produce another variation in speed, and a controllingr device for the motor adapted to be operated to drive the motor at various speeds, Wherebya great range of speed control is obtained.

FREDERICK B. DUNCAN.

Witnesses:

Y AUGUST J. BUENZLI,

ALBERT B. DEAN. 

